delta wave


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delta wave

n.
An electrical oscillation occurring in the human brain at a frequency of less than about four hertz as recorded on an electroencephalogram, associated with a state of deep sleep or unconsciousness. Also called delta rhythm.

del′ta wave`


n.
any of the slow brain waves constituting delta rhythm.
[1935–40]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.delta wave - the normal brainwave in the encephalogram of a person in deep dreamless sleep; occurs with high voltage and low frequency (1 to 4 hertz)
brain wave, brainwave, cortical potential - (neurophysiology) rapid fluctuations of voltage between parts of the cerebral cortex that are detectable with an electroencephalograph
References in periodicals archive ?
Yin, "Delta wave and vacuum state for generalized Chaplygin gas dynamics system as pressure vanishes," Nonlinear Analysis: Real World Applications, vol.
On analysis of the subband energies, it was found that the share of delta subband increased substantially with encephalopathy at the expense of decreased energy of predominant alpha waves; delta wave was seen to be around two times that of the normal EEG.
Sheng, "Delta wave formation and vacuum state in vanishing pressure limit for system of conservation laws to relativistic fluid dynamics," Zamm Journal of Applied Mathematics & Mechanics, vol.
Neuroimaging studies on fibromyalgia patients have revealed functional sleep disturbances including reduced short-wave sleep and the presence of abnormal [alpha]-rhythms or waves (usually present when we are awake, but relaxed), during delta wave deep sleep, which suggest frequent awakenings during non-REM sleep (stages 1-4).
The astounding findings, which could lead to both medical and ethical challenges concerning postmortem organ donation, were based from 'single delta wave bursts [which] persisted following the cessation of both the cardiac rhythm and arterial blood pressure (ABP).'
This includes hundreds of specific "Channels" - Delta Wave Channel, Theta Wave Channel etc..
Patient's rhythm was reverted to sinus rhythm and repeat ECG showed short PR interval and delta wave in V1, V2, V3, V4.
The Arruda ECG algorithm included delta wave polarity in its design while the Taguchi ECG algorithm included R/S ratio.
Infants below 2 years posess irregular delta wave activity(2-3.5 HZ) (amplitudes 50-100_V) in the waking state.
Subsequent EP studies demonstrated that the patient had an accessory atrioventricular (AV) tract, causing electrical activity in the heart to bypass the AV node, resulting in a delta wave on EKG (FIGURE 3, GREEN ARROWS).
The result of these multiple fronts of depolarization is a short PR interval, the delta wave, and a widened QRS complex.